Electrical Power and Household Circuits Test

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Electrical Power and Household Circuits Test - 1

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Weekly Quiz Competition

Question 1
1 / -0

A hairstylist uses a hairdryer of 750 watt for 25 minutes everyday. Find the cost to use it everyday for one year at the rate of Rs. 6.5 per Kwh.

A
Rs. 590 approx.

B
Rs. 740 approx.

C
Rs. 170 approx.

D
Rs. 1010 approx.
Question 2
1 / -0

Which of the following conditions is correct when power is transferred from one station to another?

A
High current and energy gain

B
High resistance and energy gain

C
Low current and energy loss

D
Low voltage and energy gain
Question 3
1 / -0

Which of the following statements is NOT correct for switch off position of a switch connected in live wire?

A
No current flows through the appliance.

B
It is safe to carry out repairs.

C
The appliance does not remain connected to high potential terminal through live wire

D
Both live wire and neutral wire connected with appliances are at zero potential.
Question 4
1 / -0

Which of the following relationships is not true?
Where, W = Work done in joules
Q = Electric charge in coulombs
V = Potential difference in volts
I = Current in amperes
R = Resistance in ohms
t = Time

A
W = QV

B
W = I²Rt

C
W = VIt

D
W = Vt / R
Question 5
1 / -0

Which of the following systems are used in house wiring?
(A) Tree system
(B) Branch system
(C) Stem system
(D) Ring system

A
(A) and (B)

B
(B) and (D)

C
(A) and (D)

D
(A), (B) and (D)
Question 6
1 / -0

Which of the following should a fuse wire have, used for household supply of electricity for safety purpose?

A
High resistance

B
High melting point

C
Low melting point

D
Low specific heat
Question 7
1 / -0

A pole fuse is

A
a fuse of low rating

B
connected in neutral wire at the pole

C
connected directly to the appliance

D
connected before the electric line is connected
Question 8
1 / -0

What should be the colour of live wire while wiring a plug?

A
Red

B
Brown

C
Black

D
Green
Question 9
1 / -0

Why are the electrical appliances used for household earthed?

A
Because the earth wire provides a low-resistance path for electricity to flow in an event of fault

B
Because the earth wire provides an alternative for electricity to flow if the neutral wire is not connected

C
Because the earth wire does not allow any current to pass through it

D
Because the earth wire provides a high-resistance path for electricity to flow in an event of fault
Question 10
1 / -0

Which of the following materials is used to make live wires?

A
Platinum only

B
Copper only

C
Tungsten

D
Steel

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Electrical Power and Household Circuits Test - 1

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Electrical Power and Household Circuits Test - 1

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Question 1

Rs. 590 approx.

Rs. 740 approx.

Rs. 170 approx.

Rs. 1010 approx.

Question 2

High current and energy gain

High resistance and energy gain

Low current and energy loss

Low voltage and energy gain

Question 3

No current flows through the appliance.

It is safe to carry out repairs.

The appliance does not remain connected to high potential terminal through live wire

Both live wire and neutral wire connected with appliances are at zero potential.

Question 4

W = QV

W = I2Rt

W = VIt

W = Vt / R

Question 5

(A) and (B)

(B) and (D)

(A) and (D)

(A), (B) and (D)

Question 6

High resistance

High melting point

Low melting point

Low specific heat

Question 7

a fuse of low rating

connected in neutral wire at the pole

connected directly to the appliance

connected before the electric line is connected

Question 8

Red

Brown

Black

Green

Question 9

Because the earth wire provides a low-resistance path for electricity to flow in an event of fault

Because the earth wire provides an alternative for electricity to flow if the neutral wire is not connected

Because the earth wire does not allow any current to pass through it

Because the earth wire provides a high-resistance path for electricity to flow in an event of fault

Question 10

Platinum only

Copper only

Tungsten

Steel

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W = I²Rt